专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明申请

WO1994004828A1 HYDRAULIC DRIVE UNIT OF HYDRAULIC WORKING MACHINE 审中-公开
标题翻译：液压机械液压驱动装置
公开(公告)号：WO1994004828A1
公开(公告)日：1994-03-03
申请号：PCT/JP1993001188
申请日：1993-08-25
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HIRATA, Toichi , SUGIYAMA, Genroku , ISHIKAWA, Koji , OCHIAI, Masami
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/00
CPC分类号： B01D53/28 , B01D53/40 , B01D53/46 , E02F9/2235 , E02F9/2282 , E02F9/2296 , F15B11/055 , F15B11/165 , F15B21/087 , F15B2211/20553 , F15B2211/253 , F15B2211/30505 , F15B2211/3116 , F15B2211/351 , F15B2211/40507 , F15B2211/41554 , F15B2211/6058 , F15B2211/63 , F15B2211/6309 , F15B2211/6316 , F15B2211/6333 , F15B2211/6355 , F15B2211/6652 , F15B2211/7053 , F15B2211/71
摘要： A hydraulic drive unit of a hydraulic working machine comprising: a hydraulic pump (2) of a variable capacity; at least one actuator (3) driven by pressure oil discharged from said hydraulic pump; a center bypass type direction changeover valve (1) for controlling the flow of the pressure oil supplied from said hydraulic pump to the actuator; a center bypass line (20) for connecting the center bypass path of said direction changeover valve to a tank; a first signal generating means having a fixed throttle (4) provided on the center bypass line, for generating a first control signal for determining a first target capacity of said hydraulic pump by use of pressure generated by said fixed throttle; and a pump regulator (6) for controlling a displacement capacity of said hydraulic pump on the basis of the first control signal, which unit further comprises: a second signal generating means (32 - 26) for generating a second control signal for determining a second target capacity of said hydraulic pump; and a selecting means for selecting one control signal larger in target capacity out of the first and the second control signals as a third control signal to send it to said pump regulator (6). With this arrangement, satisfactory metering characteristics similar to those in the past can be obtained under a light load and satisfactory metering characteristics can be also obtained under a heavy load.
摘要翻译：一种液压工程机械的液压驱动装置，包括：具有可变容量的液压泵（2）; 由所述液压泵排出的压力油驱动的至少一个致动器（3）; 中心旁路式方向切换阀（1），用于控制从所述液压泵向致动器供给的压力油的流量; 用于将所述方向切换阀的中心旁路连接到罐的中心旁通管线（20）第一信号发生装置，具有设置在中心旁路管线上的固定节气门（4），用于通过使用由所述固定节流阀产生的压力产生用于确定所述液压泵的第一目标容量的第一控制信号; 以及泵调节器（6），用于根据第一控制信号控制所述液压泵的排量，该单元还包括：第二信号发生装置（32-26），用于产生用于确定第二控制信号的第二控制信号所述液压泵的目标容量; 以及选择装置，用于从第一和第二控制信号中选出一个目标容量较大的一个控制信号作为第三控制信号，以将其发送到所述泵调节器（6）。通过这种布置，可以在轻负载下获得与过去类似的令人满意的计量特性，并且在重负载下也可以获得令人满意的计量特性。

72. 发明申请

WO1993024757A1 HYDRAULIC DRIVING SYSTEM 审中-公开
标题翻译：液压驱动系统
公开(公告)号：WO1993024757A1
公开(公告)日：1993-12-09
申请号：PCT/JP1993000677
申请日：1993-05-21
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , NOZAWA, Yusaku , OHTSU, Wataru , ICHIKI, Nobuhiko , INO, Kazuyuki , MATSUZAKI, Hiroshi , TAKAHASHI, Kinya
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/05
CPC分类号： E02F9/2296 , E02F9/2232 , E02F9/2239 , E02F9/2292 , F15B11/17 , F15B13/0417 , F15B2211/20553 , F15B2211/30595 , F15B2211/40515 , F15B2211/40569 , F15B2211/50536 , F15B2211/5157 , F15B2211/6052 , F15B2211/6309 , F15B2211/6313 , F15B2211/7142
摘要： There are provided: a check valve (cb1) for detecting pressure at the outlet side of a pressure compensator (VB1); a maximum load pressure detecting pipeline (SL1) for selecting a higher pressure out of a pressure detected by said check valve (cb1) and a load pressure of an actuator belonging to a hydraulic pump (P1), to thereby supply it as a signal pressure; a check valve (cb2) for detecting a pressure at the outlet side of a pressure compensator (VB2); a maximum load pressure detecting pipeline (SL2) being independent of said maximum load pressure detecting pipeline (SL1) for selecting a higher pressure out of a pressure detected by said check valve (cb2) and a load pressure of an actuator belonging to a second hydraulic pump (P2), to thereby supply it as a signal pressure; and a path (300) for merging the pressure oils from the first and second hydraulic pumps (P1 and P2), which have flowed out of variable throttles (RB1 and RB2), to thereby supply it to an actuator (B). With this arrangement, said two hydraulic pumps (P1 and P2) can have independence of each secured.
摘要翻译：提供：用于检测压力补偿器（VB1）的出口侧的压力的止回阀（cb1）; 用于从由所述止回阀（cb1）检测到的压力中选择较高压力的液压泵（P1）的最大负载压力检测管道（SL1）和属于液压泵（P1）的致动器的负载压力，从而将其作为信号压力 ; 用于检测压力补偿器（VB2）的出口侧的压力的止回阀（cb2）; 与所述最大负载压力检测管道（SL1）独立的最大负载压力检测管道（SL2），用于从所述止回阀（cb2）检测到的压力中选择较高的压力，以及属于第二液压的致动器的负载压力泵（P2），从而将其作为信号压力供给; 以及用于将来自第一和第二液压泵（P1和P2）的压力油合流的路径（300），其从可变节流阀（RB1和RB2）流出，从而将其提供给致动器（B）。通过这种布置，所述两个液压泵（P1和P2）可以具有每个固定的独立性。

73. 发明申请

WO1993013271A1 HYDRAULIC DRIVING APPARATUS FOR CONSTRUCTION MACHINES 审中-公开
标题翻译：液压驱动装置
公开(公告)号：WO1993013271A1
公开(公告)日：1993-07-08
申请号：PCT/JP1992001676
申请日：1992-12-22
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HIRATA, Toichi , SUGIYAMA, Genroku , OCHIAI, Masami
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： E02F03/43
CPC分类号： E02F9/2239 , E02F9/2292
摘要： A hydraulic driving apparatus for construction machines, wherein a first flow rate control means has first and second flow rate control valves (11a, 11b), and first interlocking means (54, 55) for interlocking the first and second flow rate control valves with a first direction control means (7). The second flow rate control valve has third and fourth flow rate control valves (12a, 12b), and second interlocking means (56, 57) for interlocking the third and fourth flow rate control valves with a second direction control means (9). A first pressure control means has at least a first pressure control valve (13a) adapted to be operated in a closing direction in accordance with a pressure signal, while a second pressure control means has only a second pressure control valve (15b) adapted to be operated in a closing direction in accordance with a pressure signal. A first hydraulic pump (25a) is connected to a first actuator (19) via the first flow rate control valve (11a), first pressure control valve (13a) and first direction control means (7), while a second hydraulic pump (25b) is connected to the first actuator (19) via the second flow rate control valve (11b) and first direction control means (7). The first hydraulic pump (25a) is connected in parallel with first actuator (19) to a second actuator (21) via the third flow rate control valve (12a) and second direction control means (9) but not via the pressure control valve. The second hydraulic pump (25b) is connected in parallel with the first actuator (19) to the second actuator (21) via the fourth flow rate Control valve (12b), second pressure control valve (15b) and second direction control means (9).

74. 发明申请

WO1993011477A1 ROBOT CONTROLLER 审中-公开
标题翻译：机器人控制器
公开(公告)号：WO1993011477A1
公开(公告)日：1993-06-10
申请号：PCT/JP1992001539
申请日：1992-11-25
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , KURENUMA, Toru , KASHIWAGI, Kunio , YAMADA, Kazuyoshi
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： G05B19/42
CPC分类号： G05B19/425 , B25J9/1684 , G05B2219/36495 , G05B2219/39321
摘要： A robot controller including an instruction/setting unit for preparing a plurality of control parameters for determining control conditins of a heavy work, and a control unit for executing a force control for the work on the basis of a predetermined control system using a plurality of the control parameters prepared. The instruction/setting means has a construction which collectively instructs and sets a plurality of the control parameters for each control condition corresponding to different work conditions in the heavy work, or in other words, it includes a force control pattern storage unit (6) and a user program storage unit (7). An instruction panel (9) is provided as an instruction device. Read/set of the control parameters from the instruction/setting means to the control means is collectively executed by a pattern selection unit (11). A display portion (9b) of the instruction panel (9) is so constituted so that the content of the prepared user program or the inputted control pattern can be confirmed with eye. In this way, in the instruction of the control condition necessary for the heavy work and in the setting of the control parameters accompanied by this instruction, handling of a large number of control parameters necessary for the control inclusive of the force control can be simplified, and convenience of the programming operation by the user can be improved. The content of the programming can be displayed on the display screen, and the content of the force control pattern can be confirmed easily with eye.

75. 发明申请

WO1992014046A1 SYSTEM FOR CONTROLLING REVOLUTION FREQUENCY OF PRIME MOVER IN HYDRAULICALLY DRIVEN VEHICLE 审中-公开
标题翻译：用于控制液压驱动车辆中原动机的转速的控制系统
公开(公告)号：WO1992014046A1
公开(公告)日：1992-08-20
申请号：PCT/JP1992000115
申请日：1992-02-05
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , ICHIMURA, Kazuhiro , TAMURA, Seiji , TATSUMI, Akira , KIHARA, Mitsuo , HOSONO, Junichi , ASANO, Kazuo
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F02D29/04
CPC分类号： B60W10/06 , B60W10/04 , B60W10/103 , B60W30/18 , B60W2540/106 , B60W2710/0644 , E02F9/2246 , E02F9/2285 , F02B41/00 , F02D29/04 , F16H61/4061
摘要： The system comprises a hydraulic pump (1) driven by an engine (21); a hydraulic motor (4) for running, driven by oil discharged from the hydraulic pump (1) during running; an actuator (52) for working, driven by oil discharged from the hydraulic pump (1) during working; a running pedal (6) for controlling a running speed in accordance with a manipulated variable during running; a reduced speed determining means (33) for determining the reduced depression of the running pedal (6); and a revolution frequency controller (33). The revolution frequency controller (33) performs a regular control for increasingly or decreasingly controlling the revolution frequency of the engine in accordance with the depth of the depression of the running pedal (6), and slow-down control for decreasingly controlling the revolution frequency of the engine to match the reduced depth of the depression when the depth of the depression is determined to be reduced. Then, when the revolution frequency of the engine is to be adjusted by the running pedal (6) during working, even if the depth of the depression of the running pedal (6) is reduced, the slow-down control is prohibited.
摘要翻译：该系统包括由发动机（21）驱动的液压泵（1）; 液压马达（4），用于在行驶期间从所述液压泵（1）排出的油驱动; 用于在加工期间由从液压泵（1）排出的油驱动的用于工作的致动器（52）运行踏板（6），用于在行驶期间根据操纵变量控制行驶速度; 用于确定所述行驶踏板（6）的下降的减速判定装置（33）; 和转速控制器（33）。转速控制器33根据行驶踏板（6）的下压深度，逐渐或者逐渐地控制发动机的转速进行规则控制，并且减速控制用于逐渐控制转速当确定凹陷的深度被确定为减小时，发动机匹配凹陷的减小的深度。然后，即使在行驶踏板（6）的运转踏板（6）的运转踏板（6）的发动机的转速被调整的情况下，即使行驶踏板（6）的下压深度减小，也禁止减速控制。

76. 发明申请

WO1992009754A1 OFFSET-BOOM CONSTRUCTION MACHINE 审中-公开
标题翻译：偏移式建筑机械
公开(公告)号：WO1992009754A1
公开(公告)日：1992-06-11
申请号：PCT/JP1991001668
申请日：1991-11-29
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , OGASAWARA, Manabu , HASEGAWA, Toshio
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： E02F03/32
CPC分类号： E02F9/2033 , E02F3/307 , E02F3/325
摘要： An offset-boom construction machine, in which a stopper plate (13) as a safety device for a front working unit (30) is rotatably fixed to the front end bottom of a cylinder stay (5) with a pin (15) and is supported by an upper boom (4) at the rear end thereof so as to sway in association with the upper boom (4). The stopper plate (13) is in such a peripheral shape as comprising a first curved part (13a) to act as first stopping means and a second straight part (13b) to act as second stopping means. When a sway angle of the upper boom (4) is within a zone involving a risk of causing interference between the bucket (7) and the operator's cab (2) with an arm (6) fully dragged in, a side (6c) of the arm strikes said first curved part (13a) before occurrence of interference as above and mechanically prevents the arm from being dragged in further whereas, when the arm in a state where a sway angle of the upper boom is in a zone free of interference as above is dragged in and a dragged-in angle of the upper boom at this time is within a zone involving a risk of causing interference as above with the upper boom laterally swayed toward the operator's cab, the second part (13b) strikes a side (6d) of the arm before occurrence of said interference and mechanically prevents further sway of the upper room.

77. 发明申请

WO1991015743A1 DIFFERENTIAL PRESSURE SENSOR AND METHOD OF MANUFACTURING THE SAME 审中-公开
标题翻译：差压传感器及其制造方法
公开(公告)号：WO1991015743A1
公开(公告)日：1991-10-17
申请号：PCT/JP1991000439
申请日：1991-04-02
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , SAKAMOTO, Yukio , TAMURA, Morio , ICHIRYU, Ken , HASHIMOTO, Hisayoshi , SATO, Fujio , HATANO, Kazuyoshi , ONOZATO, Harumasa , KUMAZAWA, Tetsuo
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： G01L13/06
CPC分类号： G01L13/025 , G01L9/0051
摘要： An industrial machine such as a civil engineering machine and a construction machine, comprising a hydraulic system in a driving system thereof, wherein conditions of pressure in respective portions of the hydraulic system are detected as differential pressure information. A diaphragm whose front and rear surfaces serve as pressure receiving surfaces and a distortion detecting portion formed on one of the pressure receiving surfaces comprise a detecting portion. Pressure medium is introduced onto the two pressure receiving surfaces. Particularly, a sheet member is provided between the pressure receiving surface having the distortion detecting portion and the pressure medium, and, this simplified construction achieves a satisfactory protection. As a sheet member fitting structure, two supporting members for clamping the diaphragm from opposite sides to fix are prepared, and, these supporting members are worked into desired forms, to thereby form a space for housing a signal lead-out-connection portion which is separated from the pressure medium. An electrical wiring portion is also protected in non-contact with the pressure medium.
摘要翻译：一种工程机械，例如土木工程机械和建筑机械，包括在其驱动系统中的液压系统，其中液压系统各部分的压力条件被检测为差压信息。其前表面和后表面用作压力接收表面的隔膜和形成在其中一个压力接收表面上的变形检测部分包括检测部分。将压力介质引入两个压力接收表面。特别地，在具有变形检测部分的压力接收表面和压力介质之间设置有片状构件，并且这种简化的结构实现了令人满意的保护。作为片状构件的安装结构，准备了用于将隔膜从相对侧夹紧以固定的两个支撑构件，并且这些支撑构件被加工成所需的形式，从而形成用于容纳信号引出连接部的空间，与压力介质分离。电接线部分也被保护成与压力介质不接触。

78. 发明申请

WO1991013217A1 HYDRAULIC DRIVE SYSTEM IN CONSTRUCTION MACHINE 审中-公开
标题翻译：建筑机械液压驱动系统
公开(公告)号：WO1991013217A1
公开(公告)日：1991-09-05
申请号：PCT/JP1991000260
申请日：1991-02-27
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , AOYAGI, Yukio
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： E02F09/20
CPC分类号： E02F9/2296 , E02F9/2203 , E02F9/2228 , E02F9/2235 , E02F9/2285
摘要： A hydraulic drive system in a construction machine, comprising: a variable capacity type hydraulic pump (1); a hydraulic actuator (6) driven by pressure oil discharged from this hydraulic pump; flow rate control means (2; 8, 10) for controlling a flow rate of pressure oil fed to this actuator; and pump control means (2, 40, 42) for controlling the discharge flow rate of the hydraulic pump in such a manner that a pump discharge flow rate is decreased with the increase of the load on the actuator and a pump discharge flow rate is increased with the decrease of the load; wherein, for the purpose of preventing a sharp increase in the velocity of the actuator due to a sharp decrease in load which is not expected to occur during the normal operation, the said drive system further comprises a first detecting means (24) for detecting the magnitude of a load applied to the actuator (6), and a flow rate restricting means (43) for monitoring an abrupt decrease in the load on the actuator in response to a signal from the first detecting means and for controlling the flow rate control means (2; 8, 10) in such a manner that the increase in velocity of the flow rate of the pressure oil fed to the actuator is restricted when it is concluded that the actuator has reached a given state indicating an abrupt decrease in the load.

79. 发明申请

WO1991005958A1 HYDRAULIC DRIVING APPARATUS OF CIVIL ENGINEERING/CONSTRUCTION EQUIPMENT 审中-公开
标题翻译：民用工程/建筑设备液压驱动装置
公开(公告)号：WO1991005958A1
公开(公告)日：1991-05-02
申请号：PCT/JP1990001310
申请日：1990-10-11
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HIRATA, Toichi , TANAKA, Hideaki , SUGIYAMA, Genroku , KAJITA, Yusuke , NAKAMURA, Kazunori
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/00
CPC分类号： F15B13/0417 , E02F9/2232 , E02F9/2296 , Y10T137/7858
摘要： This invention provides a hydraulic driving apparatus of civil engineering/construction equipment including a hydraulic pump (1), an actuator (2) driven by the pressure oil discharged from this hydraulic pump, a flow rate regulation valve (5) disposed between the hydraulic pump and the actuator, pressure compensation valves (8; 8A; 8B) equipped with a valve spool (23; 23A; 23B) for controlling the pressure difference (PZ - PLS) across this flow rate regulation valve and pump flow rate control means (9) for controlling the discharge flow rate of the hydraulic pump in accordance with the pressure difference (Pd - PLS)) between the pump pressure and the load pressure of the actuator, wherein the pressure compensation valves each include a first control chamber (30; 30A) into which the load pressure (PLS) of the actuator is introduced and which biases the valve spool in the valve opening direction by causing this load pressure to act on the first pressure receiving portion (28; 28A) of the valve spool, a second control chamber (29; 29A) into which the inlet pressure (PZ) of the flow rate regulation valve is introduced and which biases the valve spool in the valve closing direction by causing this inlet pressure to act on the second pressure receiving portion (27; 27A) of the valve spool and target pressure difference setting means (31; 50, 51; 31B, 51) for biasing the valve spool in the valve opening direction and setting the target value of the pressure difference across the flow rate regulation valve. In order to provide the actuator (2) with damping performance, the pressure receiving area (AZ) of the second pressure receiving portion (27; 27A) is made greater than the pressure receiving area (ALS) of the first pressure receiving portion (28; 28A).

80. 发明申请

WO1990014738A1 ULTRASONIC PROBE AND METHOD OF PRODUCING THE SAME 审中-公开
标题翻译：超声波探头及其制造方法
公开(公告)号：WO1990014738A1
公开(公告)日：1990-11-29
申请号：PCT/JP1990000605
申请日：1990-05-14
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HITACHI, LTD. , HORINO, Masaya , KOUNO, Akiomi , SASAKI, Souji , ARIMA, Yukio
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HITACHI, LTD.
IPC分类号： H04R17/00
CPC分类号： B06B1/0681 , G10K11/02
摘要： An ultrasonic probe characterized in that the junction surfaces of a piezo-electric element and an ultrasonic wave absorbing material are irradiated with corpuscular rays in a vacuum and are then press-adhered together. Therefore, the highly precise junction is accomplished without being exposed to high temperatures, and undesired reflection on the junction surfaces is prevented and reverberation is efficiently absorbed.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式